4’ Sliding Door Transom Window

Quickly and easily increase the effective optimizing height of Upsite Sliding Doors with Transom Windows. Just like the Sliding Doors, they are designed for tool-less installation, removal, and re-installation. Sliding Door Transom Windows are available in either black or white and increase the Sliding Doors’ total height to 93 inches.

Product Numbers
20155-450: 4’ Sliding Door Transom Window, adds 8.75” (222 mm) to door height (~50U), Black
MSRP: $499 (each)
20255-450: 4’ Sliding Door Transom Window, adds 8.75” (222 mm) to door height (~50U), White
MSRP: $499 (each)

Requires a 4′ Sliding Door for use.

Note: all standard part numbers are UL94H-B rated. Optional fire ratings are available as a custom request. Contact your sales representative for more information.


SKU: 20155-450, 20255-450 Categories: , Tags: ,

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  • Containment for either hot or cold aisle
  • Solution for both new builds and retrofit data centers
  • Modular design accommodates aisles up to 6’6” wide and any cabinet 76 inches and higher
  • Entirely tool-less installation with exclusive Magswitch Technology
  • Large, polycarbonate doors available in a variety of fire ratings
  • Available in black or white
  • Reduction of IT equipment intake temperatures, improving equipment life & reliability
  • Tool-less design allows for easy installation, removal, and re-installation
  • No drilling required in racks or cabinets
    Containment in minutes without the need for contract labor (see installation video)
  • Sizeable see-thru door panels increase safety and security
  • Reduction of operating costs by improving thermal efficiency

Product Overview Video


Fire RatingRoHS Compliance
UL 94 HB*
Can be custom built to meet UL 94 V0 or FM4910 standards

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